HAMILTON — Health officials have confirmed a fourth hepatitis A case after a food worker at Rosa's Restaurant and Catering was diagnosed with the infection in December.

A Robbinsville resident, who ate at the restaurant between Nov. 10 and Dec. 1, was diagnosed with hepatitis A on Thursday and interviewed by Robbinsville health officials, according to a news release from Hamilton Mayor Kelly Yaede's office said.

The resident works at a Hamilton business but the job and business are not accessible to the general public, resulting in a "negligible risk of exposure to the general public," the news release said.

Although the resident ate at Rosa's, located at 3442 S. Broad St., during the incubation period for the infection, health officials could not confirm "with any certainty" that the additional case is a direct result.

Symptoms can develop two to six weeks after exposure to the virus. They include mild fever, loss of appetite, nausea, fatigue, vomiting, diarrhea, abdominal pain, dark urine and yellowing of the skin or eyes.

This is the fourth confirmed hepatitis A case in Hamilton since Dec. 1, when state and local health officials announced that a food service worker at Rosa's had been diagnosed with the infection.

But on New Year's Day, the township announced there had been two additional cases of hepatitis A in a hair stylist and fitness instructor, both of whom had regular interactions with the general public.

Robbinsville residents that have any questions should contact their primary care provider or the township's health division at (609) 918-0002.